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fault code P0402

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1995auto
New User

Jun 17, 2011, 1:10 PM

Post #1 of 6 (4765 views)
fault code P0402 Sign In
i have a 1995 Mercury Grand Marquis. The check engine light came on. Hooked up scan tool came up with code P0402.. Any help would be great........


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 17, 2011, 1:26 PM

Post #2 of 6 (4758 views)
Re: fault code P0402 Sign In
That's excessive flow from the EGR system. Ir may have carbon stuck in it or have an issue with too much vacuum.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



1995auto
New User

Jun 17, 2011, 1:42 PM

Post #3 of 6 (4755 views)
Re: fault code P0402 Sign In
thanx. should i replace the EGR valve?


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 17, 2011, 2:04 PM

Post #4 of 6 (4746 views)
Re: fault code P0402 Sign In
No, you should get it diagnosed properly.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



1995auto
New User

Jun 17, 2011, 2:08 PM

Post #5 of 6 (4743 views)
Re: fault code P0402 Sign In
OK. Thanx for the advice. I will call Ford on Monday to schedule an appt.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 17, 2011, 2:38 PM

Post #6 of 6 (4740 views)
Re: fault code P0402 Sign In
It doesn't necessarily have to be the dealer that does it, just a competent diagnostic tech.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.






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